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- Abstract：Based on the haploid population from maize hybrid Zhengdan958,flow cytometer was used to observe the haploid spontaneous diploidization.The results showed that in the natural condition,there was no significant correlation between germ cell and somatic cell,and difference in diploidization between tassels and ears,which was found higher than tassels.Most of male fertile haploids were detected to stay in the state without diploidization(1C),only a few fertile haploids had been found to be the chimera,and there were about 1%-2% fertile haploids being detected to have aneuploidy(1.5C).There was a trend that somatic cell doubling increased with haploid fertility raised.Keywords：flow cytometer;maize;haploid;spontaneous doubling;diploidization3|9|4<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：One hundred twenty seven endogenous bacterial strains isolated from wheat were used in this study.Quantity of IAA-secreting and ability to dissolve inorganic and organic phosphorus of endophytic strains were measured in vitro The height,dry weight ofroots,stems and leaves of entophytic bacteria soaked wheat seeds wheat in outdoor pot experiment were determined.Data analyses were performed using multiple statistical methods including cluster analysis,discriminatory analysis and comprehensive correlation analysis.The results showed that the 127 strains were divided into four categories.The top group included six strains,RC79 and SB127(Bacillus cereus),LD161(Pseudomonas fluorescens),RA135(B.subtilis),JD204(P.putida).RB132(B.megaterium),respectively.The height,dry weight of roots,stems and leaves,quantity of IAA-secreting,ability to dissolve inorganic and organic phosphorus of wheat were the highest.The second,third and fourth groups contained 18,27,76 strains respectively.The above eight indicators of all strains displayed a significant positive correlation effect.Ability to dissolve inorganic and organic phosphorus,quantity of IAA-secreting played a significant role in promoting wheat growth.Different entophytic bacteria had different effect on promoting the wheat growth.These endophytic bacterial strains could be adopted to promote wheat growth and control wheat diseases by improving the content of IAA,and inorganic and organic phosphorus.Keywords：wheat;endophytic bacteria;screening;growth-promoting;correlation analysis5|8|8<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Being an indicator of environment variation,nitrogen-fixing bacterial community is very sensitive to the variation of environment.But the relationship between those two is unclear.This study aimed to investigate the variation of nitrogen-fixing bacterial community diversity responded to different intercropping systems by targeting nifH gene.Polymerase chain reaction-denaturing gradient gel electrophoresis(PCR-DGGE) and DNA clone technology were employed to investigate the variation of nitrogen-fixing bacterial community in rhizosphere soil as affected by oat/soybean intercropping,oat/groundnut intercropping and monocropping of these three crops.Principal component analysis indicated that nitrogen-fixing bacterial community in rhizosphere soil was relatively stable and barely changed within the intercropping system,especially in oat-soybean intercropping system.Based on the DGGE bands sequencing and Phylogenetic analysis of nifH gene,nitrogen fixing microbes mainly affiliated to Bradyrhizobium Jordan of α-Proteobacteria,Azohydromonas of β-Proteobacteria,and few other species.The rhizosphere of beans had a complicated composition,including B.Jordan of α-Proteobacteria,Azohydromonas and Pseudacidovorax of β-Proteobacteria,Klebsiella pneumonia of γ-Proteobacteria,Cyanobacteri and some uncultured bacteria.In conclusion,the oat-beans intercropping systems had effects on the diversity and community structure of nitrogen-fixing bacteria in the rhizosphere of plants.It would help us to understand the positive effects of oat-beans intercropping.6|13|12<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to investigate the annual variation of total polyphenol and flavonoid contents in the leaves of different species (varieties) of Diospyros,15 samples were measured by spectrophotometric method.The total polyphenol contents fluctuated within the range of 13.84 to 107.42 mg/g with higher variation coefficient,while the total flavonoid contents fluctuated within the range of 12.06 to 58.20 mg/g with lower variation coefficient during the entire period monitored;The annual average of total polyphenol contents in the relative varieties,wild varieties,astringent varieties and non-astringent varieties were 36.83,43.82,46.05 and 38.86 mg/g and their variation coefficients were 32.46%,30.58%,35.31% and 30.78%,respectively.The annual average of total flavonoid contents in the relative varieties,wild varieties,astringent varieties and non-astringent varieties were 33.92,29.43,27.13 and 26.19 mg/g,respectively,with variation coefficients of 21.01%,19.75%,18.59% and 17.33%.The annual variation were shown to be variable in samples,however,the optimum harvesting time were defined,as total polyphenol content was higher from July to August while total flavonoid was higher from middle to late August.The germplasms of Diaoshi,Luanchuan Niuxin,Yeshi 2 and Yuhuan Changshi were rich in total polyphenol while D.oleifera and Yeshi 1 were rich in total flavonoid.It was clear that there were abundant polyphenol and flavonoid contents in persimmon leaves with high variability,and the annual variation were variable in samples,indicating that resources evaluation based on leaves would be of great significance to the development of persimmon industry.Keywords：persimmon leaves;polyphenol;flavonoid;annual variation2|9|9<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to study the correlation of NDVI value of canopy to cotton yield during important development stages of cotton,the NDVI values of cotton spectral reflectance under different irrigation and fertilization conditions were optimized by GreenSeeker.A mathematical model of the correlation between NDVI value and yield was established and the accuracy of the model was verified.The results showed:With the development of plant,the change trends of values of the cotton canopy NDVI was relatively consistent under different water and nitrogen combinations,and all displayed "low-high-low" trend.The correlation analysis between cotton canopy NDVI values and yields at 80,105 and 140 d after seedling emergence were tested,and the correlation coefficient(R2) were 0.3760,0.0934,0.3639 respectively.Positive correlation between canopy NDVI and yields was significant. Independent experimental data was adopted to evaluate the mathematical model of the correlation between NDVI value and cotton yield at 80 d.The results showed that the correlation coefficient was 0.7126,root mean square error(RMSE) was 561.04 kg/hm2.Therefore,the cotton canopy NDVI of 80 d after seedling emergence was better for cotton yields estimation.Keywords：coupling effects of water and nitrogen;normalized difference vegetation index;estimation models;yield;cotton2|10|3<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：This study aims to understand the role of dehydration responsive element binding protein(DREBs) in plant drought resistance.With Malus sieversii Roem.as research materials,the time-space characteristics of MsDREBA6 expression was analyzed by quantitative real-time PCR(qRT-PCR).The effects of MsDREBA6 on root development were analyzed with MsDREBA6-OE Arabidopsis thaliana.The results showed that the expression level of MsDREBA6 was highest in roots of M.sieversii Roem.,and was induced by drought treatment.Overexpression of MsDREBA6 enhanced the drought resistance of Arabidopsis thaliana plants significantly. MsDREBA6- OE transgenic plants exhibited slightly decreased the primary root length,but remarkably increased lateral root density and length than wild type plants.The content of free IAA in roots of MsDREBA6 transgenic plants was significantly higher than that in WT,and ZR was slightly lower,hence the ratio of IAA/ZR was increased significantly.Further analysis showed that the auxin-related genes,which are involved in lateral root development,increased obviously.However,the biosynthesis of cytokinins was inhibited slightly. MsDREBA6 could change the balance of IAA/ZR in roots by regulating the expression pattern of auxin and cytokinin related genes,and promote the lateral root development,to improve the drought resistance of plants.3|9|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：This study focused on the genetic variation of the resistance of apple rootstock resources among different species,populations,lines and the segregation within the same lines.2-year-old seedlings of 20 accessions in 8Malus species and 1-year-old seedlings of 81 accessions in 16Malus species were subjected to iron-deficient,high-salt and high-alkaline treatments.Chlorosis index,salt injury index and alkali injury index were also investigated.For M.sieversii and M.baccata,the genetic variation of the 3 traits among different species was larger than that among different eco-geographical populations,and it was about the same between lines and among lines,while the segregation of the 3 traits within the same lines was more remarkable than that among species.A significant correlation between iron-deficient tolerance and alkali tolerance was detected in Malus germplasm resources,which was not significant between iron-deficient tolerance and salt tolerance or between salt tolerance and alkali tolerance.Besides,M.ioensis,M.xiaojinensis and M.prunifolia were successfully identified,displaying strong tolerance to iron-deficiency,salinity and alkalinity.Tolerances of apple rootstock resources to iron-deficiency,salinity and alkalinity differed substantially among different species,and there was also an obvious difference among eco-geographical populations,lines and individuals within the same lines.Keywords：Malus;seedling rootstock;germplasm resources;iron-deficiency stress;abiotic stress0|8|7<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To confirm the correlation between juvenility change and redox status,leaves on different height of the trunk in Malus xiaojinensis seedlings were sampled to analyzes miR156 relative expression,H2O2 content and activities of related enzymes,catalase(CAT),ascorbate peroxidase(APX) and glutathione reductase(GR).The results showed that leaf miR156 expression was declined significantly from the height of 1.4 m.The leaf H2O2 content and activities of CAT,APX and GR were increased gradually with the height of nodes.These results suggested that the reactive oxygen species scavenging capacity of both CAT pathway and ascorbate-glutathione increased gradually during ontogenesis.Keywords：Malus xiaojinensis;ontogenesis;juvenility;redox4|10|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：This study was conducted to investigate the effects of melatonin implantation during the cashmere latter-growing period on cashmere yield,growth and reproduction performance of Inner Mongolian cashmere goats.Thirty 3-year-old female Inner Mongolia cashmere goats with similar weight and cashmere yield in previous year were randomly assigned to one of the three groups(n=10),including the control group and two treatment groups,where in one treatment melatonin(2 mg/kg BW) was implanted twice at the end of December 2013 and February 2014 respectively and the other is only implanted once at the end of February 2014.Cashmere growth was observed and the cashmere fibre samples were collected monthly following implantation until the end of the experiment in April 2014.Initial and final body weight,litter size and birth weight were recorded.Results showed that:The cashmere fibre of goats with melatonin implantation in February 2014 was shedding obviously in the neck at the end of April 2014.However,there were no cashmere fibre shedding observed in the control and melatonin implantation in December 2013 and February 2014;the final body weight,average daily gain,litter size and birth weight were not influenced by melatonin treatments(P>0.05).Administration of melatonin has no influences on cashmere maximum length and cashmere fibre diameter(P>0.05);No difference was observed in cashmere yield between the control and melatonin implantation in both December 2013 and February 2014.However,the cashmere yield of melatonin implantation in February 2014 was lower than that of the other two groups due to the early shedding(P<0.05);the cashmere growth rate was decreased gradually from January to March and cashmere growth was ceased in April in all goats.There was no difference in the cashmere growth rate among the treats(P>0.05).These data indicated that,melatonin implantation in February 2014 resulted in cashmere shedding in advance.Although the melatonin implantation in December 2013 and February 2014 did not result in early shedding,it did not promote cashmere growth or prolong cashmere growth period.Keywords：Cashmere goat;melatonin implantation;cashmere production;growth performance;reproduction performance;cashmere latter-growing period0|9|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：This study was designed to analyze changes in the intestinal flora grower and mucosal structure under heat stress and reveal the correlation between poultry intestinal normal flora colonizing and structure changes of mucosal.Ninety six 10-week-old chickens in similar health status were selected and randomly allotted to two groups:One is normal temperature control group(24±1)℃, and the other is heat stress group(38±1℃).These chickens were feed in two individual work environment and climate cabin for trial period of 14 d.The microbial diversity of the contents in duodenum,jejunum and ileum and organizational mucosa morphological changes,the number of goblet cells in the intestinal mucosa after exposed to heat stress were analyzed using 16S rDNA PCR-DGGE technique.The results showed that flora in ileum were greatly influenced,dominant bacterial microflora in duodenum and ileum of group Ⅲ was clearly separated and there is significant difference in jejunum and ileum dominant bacteria microflora of group IV under the longer duration of heat stress.During heat stress periods,Lactobacillus reuteri,Streptomyces spiralis,Bacteroides plebeius strain,and L.acidophilus were detected in different parts of the jejunum.Bacteroidetes and uncultured bacteria were also found in ileum.In group Ⅲ,villus length,width,crypt depth and villus height/crypt depth(V/C) have all undergone significant changes:Length of all bowel villus was significantly decreased,villus length in ileum is the most significant(P<0.05);Duodenum,jejunum crypt depth and V/C were significant declined(P<0.05);Thickness of bowel wall were significantly lower than in the control group(P<0.05).The number of goblet cells in Jejunum and ileum of group Ⅲ were significantly reduced and it showed significant difference in ileum(P<0.05).The results showed that long thermal stress had strong effect on bowel bacterial microflora of adult chicken,and caused significant changes in the organizational structure of the mucosa,thereby the gastrointestinal flora balance was broke by long thermal stress,resulting in severe disrupting on digestion and absorption of chicken.Keywords：heat stress;adult chicken;intestinal bacterial microflora;intestinal mucosal structure;diversity5|9|10<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to investigate the impact of transport stress on behavior,endocrine and nNOS in the brain of animals,the rats were subjected to 35℃,120 rpm for 2 hours on a shaker to simulate the condition of road transport.Eighteen rats were randomly divided into three groups:the control group,the transport stress group(TS group),and the transport stress recovery group(TS recovery group).Behavior of rats was assessed by open-field test.Serum corticosterone(CORT) was detected using radioimmunoassay.Expression of nNOS in the supraoptic nucleus(SON) was examined by immunohistochemical technique.After transport stress,the autonomic activities of rats were decreased(P<0.01) and serum CORT was increased(P<0.01),significantly.Moreover,a significant increase in nNOS expression was detected in the SON of rats in the TS group(P<0.05) compared to the control group.Notably,the rat autonomic activities and serum CORT returned to normal level in 24 hours.However,the expression of nNOS in the SON increased further in the TS recovery group.These results suggested that transport stress has a remarkable influence on mood,behavior,endocrine and neuronal system of rats.Although behavior and endocrine condition recovered after 24 hours,the neuronal transmitter called for a longer period to recover.Keywords：transport stress;open-field test;corticosterone;SON;nNOS1|9|3<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The results showed that the fungicides of 98% fludioxonil and 98% tebuconazole had significant inhibitory effect on Fusarium sporotrichioide growth.The optimum concentration of these two fungicides was 1.25μ g/mL and theirinhibitory effects were 90.11% and 83.68%,respectively.However,the fungicides of 98% azoxystrobin and 97% hymexazol had lower inhibitory effect.Pot experiments indicated that 98% fludioxonil had significant inhibitory effect on F.sporotrichioide,and it EC50 was 2.06μg/mL.All fungicides combinations had synergy effect except combination 4,8,9 and 10.Field experiments indicated that the optimum concentrations of 50% fludioxonil and 43% tebuconazole to inhibit F. sporotrichioide growth was 250 g/hm2,which had higher control effect(69.42% and 66.78%) in field.While the combination of 50% fludioxonil(125 g/hm2) and 43% tebuconazole(125 g/hm2) had synergistic effect and better control effect,and its average control efficacy was 71.39%.Keywords：Alfalfa root rot;Fusarium sporotrichioide;toxicity measurement;field experiment2|11|12<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to reveal the geometrical feature of plots and its effects on mechanized farming in plain,demonstration analysis was conducted by taking Quzhou County,which is located in Huang-Huai-Hai Plain,as study object.The results show that the average size,length and width of plots are respectively 0.16 hm2,102.2 m,and 17.1 m.The values of plots' area,length and width show discrete distribution.The plots' length is positively correlated significantly(P<0.01) with the plots' area and the quantitative relationships between them follow power function.The plots' length is negatively correlated(P<0.01)with the plots' width.The earthen rows cover an area of 0.03 hm2 in one hectare of farmland.In farmland,the density of earthen rows is negative correlated significantly(P<0.01) with the average width of plots,the quantitative relations between the density of earthen rows and the average width of plots follow power function.The plots' shape is long and narrow as a whole.The longer sides of the plots go in different direction and transportation is inefficient among the plots.The position of farmer's plots show discrete distribution.Because the plots' size is smaller and its length is shorter,the value of plots' mechanized farming efficiency and working stroke rate cannot reach the critical value.In the process of agricultural land consolidation in Huang-Huai-Hai Plain,several separated plots of a farm family must be merged into one,and land scale circulation should be held among farmers to increase the plots' area and length to critical value,and to improve the plots' spatial layout.Keywords：geometrical features of plots;farmland;mechanized farming2|10|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The purpose to this article is to provide reference of reasonable plot size for the land consolidation. A quantitative model was built to explore the features of cultivated land fragmentation in Southwest mountainous region and revealed the relationship between the cultivated land fragmentation and land use efficiency based on household survey data.Meanwhile,the methods of field survey,literature synthesis,case study and mathematics model were utilized in this paper.The results showed that:1) There was certain characteristic with the overlay of natural and ownership fragmentation that a large number of cultivated land areas were small and the distance between home and most contracted plots was not so far away.The natural fragmentation mainly located in Caohai Village reflected existence of many natural plots;there were 67 natural plots and the average area reached 7.0×104 m2;the average S index of ownership fragmentation was 0.84,the average plot distance index(PD) was 0.22.2) When contracted plot size was ranged 0-1000 m2,the land cultivation efficiency increased rapidly with plot size increasing by about 61%,for size of land ranged 1000-1500 m2,efficiency varied slightly by nearly 13% and for size of land more than 1500 m2, the efficiency tended to be stabilize around the 0.0752 m2/s.When the contracted plot size was 0-1000 m2, the irrigation efficiency also increased with plot size increasing by 27%;for the contracted plot size of more than 1500 m2,the efficiency remained at level of 0.0826 m2/s.At constant walking speed case,it was discovered that the farther the distance between home and the contracted land,the lower the work efficiency.It is concluded that the cultivated land utilization efficiency changed with plot size in southwest mountainous region;therefore we suggested prompting land concentration through land consolidation,land property right adjustment,plot exchange(land integration) and land transfer.When the size of contracted plot become more than 1000 m2,both tillage efficiency and irrigation efficiency could be improved significantly.Keywords：mountainous region;fragmentation;use efficiency;natural plot;contracted plot;household surveys4|11|20<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The existing method to optimizing parameters of transplanting mechanism was usually blindness or computational complex.Taking three separating planting arms of elliptic gear transplanting mechanism as an example,a response surface regression model was built by adopting virtual central composite response surface experiment design,of which planting-hole width at the row spacing of 140 mm,push seedling angle and track height were adopted as objective functions,and centricity ratio of elliptical gear,teeth number,initial angle of planet carrier and initial angle of planting arm were taken as design variables.An optimum parameter combination,which meets multi-constraint conditions,was directly acquired by using optimization algorithm to solve the response surface regression model.The three separating planting arms of elliptic gear transplanting mechanism was designed and trial-produced according to the optimal portfolio parameters:centricity ratio of elliptical gear of 0.18,teeth number of 23,initial angle of planting arm of 15 and initial angle of planting arm of 25.The maximum relative error between the approximate value of regression model with the precise value of the theoretical analysis model and the measured value of test-bed was only 0.668% according to theoretical analysis and bench test.The result indicated that we could directly acquire the optimum parameter combination to meet multi-constraint conditions by adopting virtual response surface optimization method.Its computational accuracy was relatively high and it could improve the pertinence in selecting the parameters of transplanting mechanism.Keywords：rice transplanter;transplanting mechanism;response surface methodology(RSM);parameter optimization3|9|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Combined forecasting method based on support vector machine was adopted to predict the level of agricultural machinery equipment in Heilongjiang Province.On the basis of determining single prediction models,self-organizing neural network method was used to transform the problem of weights determine into a problem of importance evaluation in rough set theory and calculate the degree of dependence,importance and weight coefficient of single forecasting model on combined forecasting model.Based on support vector,non-linear combined forecasting model was established to examine the historical data of Heilongjiang Reclamation Area from 2002 to 2012.Error analysis indicated that the model predicted average relative error for total power of agricultural machinery,large and medium-sized tractor,mini-tractors,large and medium-sized tractors implementation equipment and mini-tractors implementation equipment,which were 0.471%,1.328%,3.738%,1.193% and 3.574% respectively.All values were lower than the average relative error of single forecasting model.This model was adopted to forecast the equipment level of agricultural machinery in the Heilongjiang Province.To 2020,Heilongjiang Reclamation Area will own agricultural machinery total power with 9.9933 million kW,88921 sets of large and medium-sized tractor,38453 sets of small tractors.The ratio of large and medium-sized tractor and its supporting tools will be 1.51:1.The ratio of small tractor and its supporting tools will be 1.68:1.The results showed that the combined forecasting model is suitable for predicting agricultural machinery equipment level in Heilongjiang Province.Keywords：agricultural equipment level;rough set;support vector machine(SVM);combined forecasting model2|9|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：From the perspective of cultivated land use,spatial-temporal analyses was conducted to investigate the factors affecting the change of grain production.In this paper,Logarithmic mean weigh division(LMDI) was applied and the provincial crop production change from 1980 to 2010 was decomposed into four factors:Per unit area yield of grain,multiple crop index,the cultivated land area and grain proportion.And the statistical indicators of food production and its decomposition factors at the provincial level were analyzed in detail.Results indicate that:1) China's grain production increased 225.923 million tons between 1980 and 2010;Food production pattern was transferred from more important in the South than in the North to more important in the North than in the South;2) Per unit area yield of grain in the four factors played the most significant role in promoting production,but promoting effect was weakened year by year and replaced by the multiple crop index and grain percentage;3) The cultivated land was decreased to some extent,which limited the increase of China's grain production;4) Among the provinces,domain decomposition effect on the change of grain production factors had significant spatial difference.In Fourteen areas including Hebei,Hubei and Xinjiang,per unit area yield of grain and the superposition of multiple crop index effect increased production significantly.In Shanghai,Zhejiang and Fujian,the effect of crop proportion and multiple cropping index on grain production was the largest.The decreasing of per unit area yield of grain effect with negative correlation of the cultivated land area indicated that the food production in China has been forced to the frontline.Protecting farmland use number and improving its quality is the keys.5|11|15<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：From 2004,the policies of minimum purchasing price and temporary reserve have played important roles in protecting farmers' benefits,improving farmers' passion of planting grain and ensuring national food security.With the implementation of these policies,the ceiling effect of grain price begins to appear,the increasing cost floor is more and more obvious.From the perspective of policies implementation and changes,this paper reviewed the existing researches on pricing mechanism and volatility of grain products.And found that there is insufficient researches on the pricing mechanism of classified grain products and the comparison of before and after the soybean pricing mechamism policy implementation, the research on regulate target and changes in the social welfare should be intensified.Keywords：grain price;pricing mechanism;affecting factors;volatility features;regulatory policies13|10|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：This study reviewed practical applications of binary or multivariate logistic models and also tried to explain economic implication of logistic model coefficients by comparing various statuses of explanatory variables based on characteristics of binary,polytomous and continuous variables.Some of the applications are arguable and should be amended.Specifically,vegetable growers' behavior in the background of vegetable price volatility was investigated.Based on the logistic models,the main conclusions are as follows:firstly,when the probability of not giving up cultivating vegetables is assumed to be 50% in background of vegetable price volatility for farmers who has others experiences besides farming,the probability for those who just has farming experience not to give up vegetable cultivation is 79.18%.Similarly,when the probability of not giving up cultivating vegetables is assumed to be 50% for farmers whose main income source is not vegetable cultivation,the probability for those whose main income source is vegetable cultivation not to give up vegetable cultivation is 84.44%.So it is concluded that the farmers whose main income source is vegetable cultivation and main experience is farming are less possible to give up planting vegetables when price is volatile.It implies that when vegetable price is volatile frequently and the uncertainty in vegetable market increases,the probability for farmers to give up vegetable cultivation will increase.Vegetable price and supply are related with each other.Ensuring vegetable supplies could stabilize price and vegetable price stabilization could ensure supplies as well.Keywords：vegetables;price;volatility;producer behavior;logistic model2|13|4<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to reveal the characteristics and influencing factors of different type farmer's loan behavior,investigation data of 573 farmers for 6 years in different areas were analyzed using ANOVA analysis and random effect models.The result indicated:1) The impacts of age,farmland and Available Credit Limit status of Farmers who lived on agriculture were significant higher(P<0.01) than those did not.Farmers who lived on agriculture are significant higher than farmers who didn't live on agriculture in age,farmland and whether enough or not in Available Credit Limit(P<0.01);but the impacts of education,labor,property of farmers,social resource,total assets of the family,total liabilities,family net income,Available Credit Limit,amount of credit in one year and the amount of average credit(P<0.01) were significant lower(P<0.01) than later;2) The effect of Available Credit Limit was different to different type of farmers.To farmers who didn't live on agriculture,the Available Credit Limit was significantly and positively affected by domestic population,property of farmers,social resources,total assets of the family,total liabilities,family net income and years of the loan amount(P<0.01),but negatively affected by land acreage,gender,Available Credit Limit,Available Credit Limit status,the amount of average credit and age(P<0.01).To farmers who lived on agriculture,their Available Credit Limit was significantly and positively affected by education years,property of farmers,social resources,whether enough or not in Available Credit Limit,family net income and years of the loan amount(P<0.01),but negatively affected by land acreage and gender(P<0.01).In conclusion,different loan policy should be adopted for different type of farmers.Keywords：farmer 's loan behavior;available credit limit;panel data;rural finance1|9|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Taking the panel data of 12 western provinces in China from 2002-2012 years and using fixed effects model,this study analyzes the correlation effect between agricultural products supply chain development and rural households' poverty reduction along with income increase.The results show that there is an obvious positive correlation between agricultural products supplies chain development degree and rural households' per capita net income.Under the constructed index evaluation system of the agricultural products supply chain development,the first industrial output ratio,agricultural GDP per capital,the Engel coefficient of rural residents as well as the average amount of plastic sheeting and diesel have significant impacts on rural households' poverty reduction along with income increase in underdeveloped area of China.4|9|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：On the basis of determining the scope of flower products,this paper analyzed the level and structure of intra-industry trade across Taiwan Strait in flower products from 1996 to 2013 by using empirical studies of G-L index,Aquino index,Brulhart marginal intra-industry trade index,Thom & McDowell horizontal and vertical intra-industry trade index.The results showed that intra-industry flower trade was still in the low level across Taiwan Straits and was dominated by inter-industry trade.The growth of flower trade between the Chinese mainland and Taiwan was mainly stimulated by inter-industry trade;although the vertical intra-industry trade has been increasing,the horizontal intra-industry trade was the main form of intra-industry trade.Policies on how to promote flowers product trade across Taiwan Strait and strengthen flower industry cooperation between them under the background of ECFA were recommended at the end of this paper.Keywords：flower products;cross Taiwan Strait;intra-industry trade;cooperation2|9|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
